Features: Titanium Case With Dia Shield Coating Titanium Bracelet Solar Powered Caliber: V157 Hardlex Crystal Magnetic Resistance Black Dial Luminous Hands And Markers Unidirectional Rotating Bezel Overcharge Prevention Function Accuracy: +15/-15 Sec Per Month Screw Down Crown Screw Case Back Double Lock Clasp With Push Button Release 200M Water Resistance Approximate Case Diameter: 44.1mm (Without Crown) Approximate Case Thickness: 12.4mm